other sea cortez species

[lorquinianus]

the first one is similar to olivella zanoeta and has the smae lenght  1.5 cm, I thought it was a variation but I have other smaller with the same pattern
<a href="http://www.badongo.com/es/pic/9271677" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/es/pic/9271677">http://www.badongo.com/es/pic/9271677</a><!-- m --></a>

this other one measure 2 cm, is a volutidae o mitridae species? I could find any similar, is the only want I got. Has an amazing pattern.
<a href="http://www.badongo.com/es/pic/9271618" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/es/pic/9271618">http://www.badongo.com/es/pic/9271618</a><!-- m --></a>
Hope some could identified them, thank you!